<template>
  <div :class="className" :style="{height:height,width:width}" />
</template>

<script>
import echarts from 'echarts'
require('echarts/theme/macarons') // echarts theme
import resize from './mixins/resize'

export default {
  mixins: [resize],
  props: {
    className: {
      type: String,
      default: 'chart'
    },
    width: {
      type: String,
      default: '100%'
    },
    height: {
      type: String,
      default: '300px'
    },
    title: {
      type: String,
    },
    legendData: {
      type: Array
    },
    seriesData: {
      type: Array
    }
  },
  data() {
    return {
      chart: null
    }
  },
  watch: {
    legendData: {
      handler(newVal, oldVal) {
        this.initChart(); //处理数据
      },
      //immediate: true, // //immediate:true代表如果在 wacth 里声明了之后，就会立即先去执行里面的handler方法，如果为 false，不会在绑定的时候就执行。
      deep: true, //默认值是 false，代表是否深度监听
    },
  },
  // mounted() {
  //   this.$nextTick(() => {
  //     this.initChart()
  //   })
  // },
  beforeDestroy() {
    if (!this.chart) {
      return
    }
    this.chart.dispose()
    this.chart = null
  },
  methods: {
    initChart() {
      this.chart = echarts.init(this.$el, 'macarons')

      this.chart.setOption({
        tooltip: {
          trigger: 'item',
          formatter: '{a} <br/>{b} : {c} ({d}%)'
        },
        legend: {
          left: 'center',
          bottom: '10',
          data: this.legendData
        },
        series: [
          {
            name: this.title,
            type: 'pie',
            roseType: 'radius',
            radius: [15, 95],
            center: ['50%', '38%'],
            data: this.seriesData,
            animationEasing: 'cubicInOut',
            animationDuration: 2600
          }
        ]
      })
    }
  }
}
</script>
